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Two right angles of a right triangle are 15cm and 20cm. Take its hypotenuse as the axis of rotation for one cycle to get the revolving body. Find the area of the revolving body Or tell me the formula to find the angle. I forgot what I learned before
The circumference of the bottom circle C = 2 π R
Taper bus length L
The side area s of the cone is the area of the expanded figure on the side of the cone
Its radius is l and the arc length is the circumference C of the bottom circle
So s = (CL) / 2 = π RL
The area of the body of revolution is actually the side area of two cones
First find out two generatrix
The generatrix of the cone corresponding to radius 20 is L = 16
The generatrix of the cone corresponding to radius 15 is L = 9
The radius of the circle at the bottom of a cone is r = 12 (according to Pythagorean theorem, the inclined side is 25, and the height on the inclined side is 12 12 according to the area of 20 × 12 = 25 × height)
be
π×12×16+π×12×9=300π
If the two right sides of a right triangle are 6 and 8, and the hypotenuse is 10, then the height on the hypotenuse is
The product of right angles divided by the hypotenuse
Given that the lengths of the two right sides of a right triangle are six and eight respectively, the length of the center line on the hypotenuse is
The center line on the hypotenuse of a right triangle is half of the hypotenuse. The answer is 5
Given that the lengths of two right angles of a right triangle are 6 and 8 respectively, then the length of the center line on the hypotenuse is
According to the length of the right angle side given by the triangle, we can calculate that the length of the hypotenuse of the triangle is 10. This triangle is a special triangle, the variable length ratio is 3:4:5, cosa = 3 / 5, and the two edges of two a are 3 and 5 respectively. Thus, according to the trilateral formula cosa = (b ^ 2 + C ^ 2-A ^ 2) / (2BC), the third side a = 4 can be obtained
The length of the two right sides of a right triangle is 6 and 8. Find the height of the hypotenuse. The length of the hypotenuse is divided into two parts by the height
∵ RT △ the lengths of the two right angles are 6 and 8
The length of the slanted edge of RT △ is 10 (i.e. 3:4:5 = 6:8:10)
﹣ six sides are the oblique sides of small RT △ and are 5 parts
The small side of the small RT △ is 3 parts
The small segment = small side = 6 / 5 * 3 = 18 / 5 (= 3 + 3 / 5)
Large section = 10-18 / 5 = 50-18 / 5 = 32 / 5 (= 6 + 2 / 5)
What is the distance between the center of gravity and the hypotenuse of two right triangle with right angles of 6 and 8!,
The distance from center of gravity to inclined edge GN = 1.6 = 8 / 5
Given that two right triangles with right angles 6 and 8 respectively, find the ratio of the hypotenuse to the height on the hypotenuse
The ratio of the three sides of a typical right triangle is 3:4:5
The hypotenuse of the triangle is 10
The height on the hypotenuse divides the triangle into two small right triangles similar to and similar to the large triangle
The ratio of height to long right angle side is exactly 3:4
So the height is 3 / 5 * 8 = 24 / 5
Therefore, the ratio of the slope to the height on the bevel is 10: (24 / 5) = 25:12
If two sides of a right triangle are 6 and 8, and another similar right triangle is 3 and 4 and X, then the value of X is () A. Only one B. There can be two C. There are more than two, but limited D. There are countless
According to the meaning of the title, there are two possibilities for a right triangle whose side length is 6 and 8. One is that 6 and 8 are right angles. According to the Pythagorean theorem, the hypotenuse is 10. The other is that 6 is a right angle side and 8 is an oblique side
If two sides of a right triangle are 6 and 8, and another similar right triangle is 3 and 4 and X, then the value of X is () A. Only one B. There can be two C. There are more than two, but limited D. There are countless
According to the meaning of the title, there are two possibilities for a right triangle whose side length is 6 and 8. One is that 6 and 8 are right angles. According to the Pythagorean theorem, the hypotenuse is 10. The other is that 6 is a right angle side and 8 is an oblique side
If the side length of a right triangle is 6 and 8, find the oblique side length
Pythagorean theorem 'hypotenuse = √ (6 ^ 2 + 8 ^ 2) = 10
RELATED INFORMATIONS
- 1. Given that the two right angles of a right triangle are 6 and 8 respectively, the distance from the intersection of the three interior bisectors to the right triangle is equal to ()
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